Page 124 - Introduction to Marine Engineering

Feed systems 111
The various heat exchangers should be checked regularly for tube
leakages and also the cleanliness of the heat-exchange surfaces.
The operation of the reciprocating positive displacement pump is
described in Chapter 6. Turbo-feed pumps are started with the
discharge valve closed in order to build up pressure rapidly and bring
the hydraulic balance into operation. The turbine driving the pump will
require warming through with the drains open before running up to
speed and then closing the drains. The turbine overspeed trip should be
checked regularly for correct operation and axial clearances should be
measured, usually with a special gauge.